DEVICE FOR CHECKING AUTOMATIC CAB SIGNALLING Russian patent published in 1996 - IPC

FIELD: railway signalling and communication. SUBSTANCE: device has choke-transformer connected to one end of rails of check section by one winding with center tap. Signal current source is connected to other winding of choke-transformer. Regulating rheostats, switches and traction current source simulator are connected to other end of rails of check section. Traction current source simulator is connected by one lead to middle tap of choke-transformer, and by other lead, through switches and regulating rheostats, to corresponding ends of rails of check section. Additive impulse noise shaper has magnetograph and matching unit. Magnetograph is connected to input of traction current source simulator through matching unit. EFFECT: enhanced reliability of checking. 2 dwg